Ethiopian State 2-6-0 Locomotives in Ethiopia

Class Details by Steve Llanso of Sweat House Media

Class Rhinoceros (Locobase 6812)

Data from the table presented on pages 416, 417 of the Groupe VI. - GTnie civil. - Moyens de transport. DeuxiFme partie. Classes 32 (Tome I), part of the series of Rapports du Jury Internationale of the Exposition Unverselle Internationale de 1900 Paris Exposition, hosted on the website of Le Conservatoire numTrique des Arts & MTtiers ([], Accessed 21 August 2005).

This lightly loaded design (SLM works #1225) answered to a requirement to scale a 3% grade pulling 85 tonnes (including the tender) at 18-22 km/h (11-13.5 mph). The Jury report notes that the railway chose a Mogul arrangement because they needed only as much adhesion weight as three axles would bear on their light rail, but that spreading the weight over 4 axles gave them a stable and flexible engine. It was an oil-burner.

According to Jean-Pierre Crozet's Franco-Ethiopien Railway website listing, of the 4 locomotives ordered and constructed, the 1900 engines named Rhinoceros and Antilope were in fact delivered. The two from 1901 -- works numbers 1381-1382 -- were lost at sea. Several years later, SLM supplied 3 more locomotives, now equipped with superheaters; see Locobase 12598.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID6812
RailroadEthiopian State
Number in Class2
Road Numbers5-8
Number Built4
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.54 / 2.91
Engine Wheelbase (ft / m)16.73 / 5.10
Ratio of driving wheelbase to overall engine wheelbase 0.57
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)18,519 / 8400
Weight on Drivers (lbs / kg)49,604 / 22,500
Engine Weight (lbs / kg)59,525 / 27,000
Tender Loaded Weight (lbs / kg)51,809 / 23,500
Total Engine and Tender Weight (lbs / kg)111,334 / 50,500
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)660 / 2498
Minimum weight of rail (calculated) (lb/yd / kg/m)28 / 14
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)14.17" x 21.65" / 360x550
Tractive Effort (lbs / kg)13,394 / 6075.42
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.70
Heating Ability
Tubes (number - dia) (in / mm)142 - 1.772" / 45
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.50 / 3.20
Firebox Area (sq ft / m2)68.86 / 6.40
Grate Area (sq ft / m2)11.30 / 1.05
Evaporative Heating Surface (sq ft / m2)758 / 70.45
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)758 / 70.45
Evaporative Heating Surface/Cylinder Volume191.82
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1966
Same as above plus superheater percentage1966
Same as above but substitute firebox area for grate area11,982
Power L13883
Power MT517.73

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